Multimedia Networking: Technology, Management, and by Syed Mahbubur Rahman

By Syed Mahbubur Rahman

Lately fast web development has driven the improvement of latest multimedia functions in all facets of lifestyles akin to leisure, conversation, collaborative paintings and digital trade. destiny purposes will utilize various applied sciences like voice, info and video, yet with the intention to make any such good selection of multimedia purposes profitable, a couple of expertise and administration matters needs to be addressed. Multimedia Networking: know-how, administration and purposes addresses the dynamic and effective makes use of of assets – a primary element of multimedia networks. aimed toward pros, educators and scholars alike, this fascinating new ebook will element present examine and the longer term path of multimedia networking.

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The authentication header can be used for two purposes: 1. Verification that changes a session description or deletion of a session are permitted. 2. Authentication of the identity of the session creator. SAP is not tied to any single authentication mechanism. The precise format of authentication data in the packet depends on the authentication mechanism in use. SAP protocol describes the use of Pretty Good Privacy (PGP) (Callas, Donnerhacke, Finney and Thayer, 1998) and the Cryptographic Message Syntax (CMS) (Housley, 1999) for SAP authentication.

Optional authentication data containing a digital signature of the packet, with length as specified by this authentication length header field. msg id hash: Message Identifier Hash. A 16-bit quantity that, used in combination with the originating source, provides a globally unique identifier indicating the precise version of this announcement. Originating source: This gives the IP address of the original source of the message. Whether it is an IPv4 address or an IPv6 address is indicated by the A field.

25. In addition, SIP is a text-based protocol, and much of the SIP message syntax is and header fields are identical to HTTP. SIP uses URL for the user and service addressing. However, SIP is not an extension of HTTP. As SIP is used for initiating multimedia conferences rather than delivering media data, it is believed that the additional overhead of using a text-based protocol is not significant. Controlling Multimedia Servers: RTSP A standard way to remote control multimedia streams delivered, for example, via RTP, is Real-Time Stream-Control Protocol (RTSP) (Schulzrinne, Rao and Lanphier, 1998).

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